Butterfly fire prevention temperature sensing device

The invention discloses a butterfly fire prevention temperature sensing device. The butterfly fire prevention temperature sensing device comprises a cross beam which stretches across a valve body opening and is provided with an upward bulged arch structure in the middle, and a positioning shaft which is arranged on the arch structure in a penetration mode, wherein two rotation arms and two torsionsprings in one-to-one correspondence with the two rotation arms are symmetrically arranged on the positioning shaft in a penetration mode, one end of each torsion spring is abutted against each rotation arm, the other end of each torsion spring is abutted against the arch structure, and meanwhile the two rotation arms are connected through two fusion slices bonded with each other. The butterfly fire prevention temperature sensing device adopts design of the torsion springs and the rotation arms, and when the rotation arms rotate along the positioning shaft under the action of torsion of the torsion springs, the rotat